JEE Main 2019 — Maths solution | Fundamenthol

JEE Main2019Maths

Q.

Three circles of radii a, b, c(a < b < c) touch each other externally. If they have x-axis as a common tangent, then :

A
$\frac{1}{a} = \frac{1}{b} + \frac{1}{c}$
B
a, b, c are in A. P.
C
$a, b, c$ are in A. P.
D
$\frac{1}{b} = \frac{1}{a} + \frac{1}{c}$

Solution

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